NO. As-is balance/imbalance is essential albeit frustrating at times when you’re trying to get some time in and no one else to run with and your sorc/zon/whatever is stifled because of so many immunes in Hell mode. Very few builds can actually kill every single thing anyway, and the ultimate goal of said elemental builds having a hard time progressing through Hell is to arrive at FINALLY having a godly boost from getting Infinity on your merc. A strat in the meantime that’s actually a good one is to use a Wand of Lower Resist on switch. This doesn’t break a lot of immunities like an Infinity would, but that LR curse with some item/set bonuses giving -x% to enemy resist (believe it or not) it just enough of an edge with a smartly stat’d character to make some headway in Hell. If you’re lucky enough to get some Rainbow Facet along the way, even better!
The sorc being the most hampered by all of these immunes + her squishiness factor are actually pretty accessible to overcome. Tal’s Amulet, Orb, Belt and Mask ALL drop in Nightmare. Granted, the ammy is STOOOOOPID rare anywhere in the game, but if doing the Fire build for the 3-piece bonus isn’t your jam, MF for a Tal Ammy or something equally awesome to trade for it so you can get the Lightning bonus and do a Lightning Hell build instead. (Which a 4-piece Tal Light sorc is AWESOME in hell, btw). Throw in the Wand of LR, a possible lucky facet or 2, and especially if you get the Infinity together = You can now solo Hell A1-5 AND kill every single thing. 